Synchronizing device.



J. W. BRYCE.

SYNGHRONIZING DEVICE.

APPLICATION FILED 00119, 1907.

1,075,626. Patented 0ct.14,1913.

4 SHEETS-SHEET 1.

WITNESSES: INVENTOR A L18 "13 M W W ATTORNEYS Patented Oct. 14, 1913.

0 9 I E, 09 I1 EH1 m G RNm BHL n -N WON m JMT u YI 8L P P A BY M ATT WITNESSES:

J. W. BRYCE.

SYNCHRONIZING DEVICE.

APPLICATION FILED OUT. 19, 1907.

Patented Oct. 14, 1913.

4 SHEETS-SHEET 3.

ATTORNEYS 'IIIIIIIIIIIIIIIIIIII V///////9IIIIIIIIIIIII WITN ESSES' FICE.

JAMES WQBRYCE, or BROOKLYN, NEW

YORK.

SYNCI'IRONIZING DEVICE.

Application filed October 1 To all whom it may concern:

Be it known that I, J AMES W. BRYCE, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Synchronizing Devices, of which the following is a specification.

My invention relatesto machines where constantly operating drivin mechanism opcrates other or driven mechanism synchronously or in some manner of unison therewith.-

It has for its object to provide means for separating the driven. mechanism from .the driving mechanism, and stpppingthe formerior any period of time without interfering with the continued operation of the driving mechanism, and'for re-connecting them insuch a manner son with the driving mechanism.

It consists of the; novel devices shown and described. I l v In the draw1ngsaccompanying-this eci fication, and f0rming. pa1 t;. hereof, I, v ave Shown my.. vsn en. i ei ldi n c nn tion with=. a cl ck ngyemen t e 1 1 i' ereeifia-e e..j iel m i y invention,- the; time reco r,

p g thecoiitmiiedrunning of the latter, forzthe purpdse of printin the time upon some ;suitable record, an after this has been accomplished, the recording mechanism is again connected with the out interfering wi h clock .movement in sucha manner as to suitable mechanism in-unlsonwith it, either .unison in pointof time or unison in some other particular, and where it' is-desired to separate the driven mechanism"from the driving mechanism for any purpose and for any length of time, and to re-connect them so that the two mechanisms will operate in the same sort of unison.

I will now proceed to describe the particular form or embodiment of my invention disclosed in the drawings.

Of these drawings, Figure 1 is a central Specification of Letters Patent.

that the driven mechanism will be insynchronism .or in un1-.

herein mame hen sm separated ,from; the .clo,ck,;i n ement with:

Patented Oct. 14, 1913.

Serial No. 398,171.

vertical section of an ordinary time recorder provided with my improved synchronizing device. Fig. 3 is a side view (cularged) of the synchronizing device, which as shown, is connected with the driving shaft between theclock movement and the recorder proper. Fig. 3 is a detailed horizontal section. F ig. l is a detailed section of part of the gearing ofthe differential gearing of the synchronizing device. Fig. 5 is an enlarged vertical section through part of the synchronizer. Figs. 6 and 7 are detailed views of the locking bar or centralizing plow or cam. Fig. 8 is a top view of the synchronizing device. V tailed horizontal section on the lines 9 -9 of Fig. 2. Fig. 10 is a side view of part of the synchronizing device. 7 A

ific devices'fof the Referring to the spec said drawings, 1 representsmachine. v l represents the ordinary clock movement and; 10 the ordinary time recordingmechanisnri' of a Rochester time recorder. In the drawings these without giving all of the details, as ,form no A .known.

The recording me pivoted at 13.3 not only operates the recordin but also operates my improve I ing devices, as will be later described,

As usual, the clock movement is placed in the upper part of the two are connected by tw'o driving shafts l and 5. Between these my improved devices ment, without interfering with the con tinued operation of the latter, and for reconnecting the two mechanisms at a later point of time so that the recording mecha nism will'be in synchronism with the clock movement. f

3 represents the main body casting of the synchronizing device. Mounted in hearings in brackets 17 and 26, secured to casting 3, is a shaft 15. This shaft is connected to the lower end of driving shaft 4, and is driven thereby. Shaft 15 carries secured to it at its lower end a spur gear 16, which meshes with a spur gear 25 of exactly the same diameter. Gear 25 is secured to a sleeve 59 loose on shaft 33.

the case of the are represented 'generally'.f they part of the invention, and arewell. v hanishi i s' pro- Evided. with the a usual -'ope'rating' handle '11, i The operation of this'ha ndlef I mechanism; I

synchroniz two shafts areplaced for separating the re-' cording mechanism from the clock move- '90 case, and the recording mechanism in the lower part.. The

Sleeve 59 carries at its lower end a gear 31. Shaft 33 is loosely mounted at its upper end in apart of the casting 3, and at its lower end is mounted in a ball bearing in a boss 60 forming the upper part of shaft 49. A ball 42 in a recess in boss 60 forms the lower bearing for shaft 33. Shaft 49 is mounted in a bearing in casting 3, and at its upper" end its boss 60 encircles the lower end of shaft 33. Boss 60 is secured to the shaft, and this boss carries at its upper end secured to it a gear 41, the same size as gear 31.

Shaft 33 carries at its lower end a spider casting 32, which has two rings 28 and 30 fastened to it by means of the rivets 29, 35 and 36. These two rings 28 and 30 serve as a sup ort for the pinions 37 and 38 loosely mounte on studs 39 and 40 secured to rings 28 and 30. These pinions mesh with each other, and one. of them, 38, meshes with gear 31, while 37 meshes with gear 41. It will be seen that these'parts constitute adifierential gearing, the purpose of which will be presently explainedf I Q 27 is a toothed wheelon shaft 49', with which a pivoted arm 45 is adapted to engage for alinin and locking purposes, as will presently he ',described. Connecting the lower end of shaft 49' with the upper end of shaft 5 is a universal joint 50, which may be of any suitable construction.

In the ordinary runningjof the machine,

shown in the drawings, shaft- 33 and spider.

32, with its ring's28' and .30, are lockedor prevented .from rotating by means presently. to be described 'ln this condition of the. parts, motion is. transmitted from the; 'clo'cir movement 2 through shaft'sj 4 'a'nd15, gears sleeve59, ears-1,: inions 38,37, toss-60, shaft 49, suit-15 to the 1 and 25 gear 41,' hour and'minut'e time recording wheels of the recording mechanism and theflatt'e'r are moved in synchronism with the clock movement in the usual manner. Whenever it is desired to print the time from these time recording wheels, it is important to discon nect them from the clock movement, not only: to hold thewheels rigid during the printing,

but also to prevent any strain on the clock movement or to prevent its stopping. It may also be advisable, for other purposes, to sometimes separate the recording mechanism from the clock movement, and to keep it separated for an indefinite period of time. Whenever the time recording wheels are separated, however, from'the clock movement, it is essential that whenthey are reconnected, the time recording-wheels should be in synchronism with the clock movement. This would not be thecase if the clock movement had moved one or mofrelunits of time during the separation, and if the time recording wheels were then simplyconnected with the clock movement. By means of my improvement, the time recording wheels can be separated any length of time from the clock movement, and when reconnected will be moved one way or the other so that they will be in exact synchronism with the clock movement, so that subsequent indications or records given by them will represent the correct time, as appearing by the clock movement. This I accomplish in the particular ,devices shown in the drawings, by locking the recording mechanism, and the shaft 49 and gear 41, and unlocking the'spider 32 of the differential gearing. This operatively disconnects the driving mechanism from the clock movement, while permitting the clock movement to continue its operation without hindrance.

Spider 32 and shaft 33 are normally held locked by means of a cross-piece 24 securely fastened to the upper end of shaft 33. This cross-piece carries at each end a wedgeshaped piece 345, 35, seeparticularly'Figs. 6- and 7. Just inside of each of these wedge-" shaped pieces is a roller 22 and 23, secured to cr0ss'pie'ce'24. 18 "isa pointed plow free to slide horizontally in guides 21 of the casting 3.

Fig. 8 represents the normal position of these parts with the plow 18 resting between rollers'22 and 23, and making contact with each. --Thi s locks cross piece 24, and with itshaft 33 and spider 32. A lug 19 is connected with plow'18 for giv ing it a reciprocating horizontal movement @tO. withdraw it from its'locking position, or

insert "it therein. Means for accomplishing this'are described below. whenever-p'lewia is' wit-hd'rawn 'from its lockingposition between-rollers 22 and 23, as. it is 7 when the .recordi'ng mechanism is locked, the "rotai'y" movement of gear 31' is imparted jthrou'gh' pinions 38 and 37 to spider 3 2. gear 41' is now looked,"gear 37, instead 'of turning it, rotates around it, carrying with it spider'32, and rings 30 and 28- and. pinion 38. The clock movementis thus permitted-to continue its operation, and effect is simply to idly rotate the spider and its connecting parts without ro-' tating shaft 49 or operating the recording. mechanism. While the clock movement is stillconnected with the recording mechanism, in the sense that gear 41 is still in mesh with pinion 37, they are in fact operatively disconnected, as the connection between gear 41 and pinion 37 is. an idle one and does no work as far as concerns the record ing mechanism. p v

The means shown for locking and un-' locking shaft 49 and spider 32 of the differential are as follows: Pivoted at the outer end of shaft 13 is a crank arm 12. When handle 11 is depressed, it rocks shaft 13, and rocks handle'12 downward. This pulls downward a link 9 pivoted to crank arm 12, and rocks a bell crank lever 7, to which the link is pivoted at its upper end. This bell crank 7 is pivoted in casting 8 secured to the framework. The other arm of the bell crank 7 is pivoted to a link 6. This is likewise pulled down, and it rocks with it crank arm 55, secured to shaft 54, journaled in the casting 56 secured to the framework. At one end of shaft 54 is bevel gear 53 meshing with a bevel gear 52 on a shaft 51, also journaled in suitable bearings in casting 56. Mounted on shaft 51 is cam 46. As handle 11 is depressed to print the time of day of the recording mechanism, cam 46 is rotated to the left, as indicated by the arrow in Fig. 2. This movement of cam 46 unlocks spider 32 of the differential, and also locks wheel 27, and with it the recording mechanism. It does the former through a cam roller,48.running in a groove in cam 46, shown in Fig. 2, which roller is mounted on one arm 47 of a bell crank lever, the other arm of which'is 20, and which bell crank lever is pivoted at'52 on the casting 3. Arm 20, at its upper end, is forked, both parts of the fork withplow 18. The action of the cam in the groove throws arm 20 to the right, as viewed in Fig; 2, and withdraws plow 18 from contact with'rollers 22 and 23. In other words, it moves the plow from the position shown in Fig. 6 to that of Fig. 7, thus releasing cross-piece 24, shaft'23 and spider 32 of the differential.- Thereuponthese parts are free to move as driven by the clock movement, as above described.

Wheel 27 and the recording mechanism are locked by means of an extension 58 from bellcrank lever 20, 47, which is provided with a slot 57. In this slot works a pin at the lower end of link 50. The upper end of link 50 connects with the arm 45. The rotation of cam 46 to the left, as above described, forces that arm to the left, as viewed in Fig. 2, until its upper end, which is wedge-shaped, enters between two of the teeth of gear 27, against the opposition of the spring 44 secured to an arm 43 projecting from the framework. This has the double effect of alining the time recording wheels to bring the proper type representing the hour and minute on the exact printing line, and also the effect of locking wheel 27 and the recording mechanism. When operating handle 11 returns to its upper or original position, all of these parts are, of course, returned to their original positions, tension spring 44 retracting the arm 45 and withdrawing it from contact with gear 27, and unlocking the recording mechanism. The return movement of cam 46 positively forces plow 18 to the left. In this movement, it will strike either roller 22 or 23 somewhere in its movement, and will force it, together with the cross-piece 24, back to its original position shown in Fig. 6.

being slotted to receive a' pin 31- extending sidewise from spur 19 connected- This again locks shaft 33 and spider 32. In this position of the parts, the clock movement will again actuate the recording mechanism.

In the operation of the parts, when the recording mechanism is locked, and the spider 32 is free, cross-piece 24 will rotate at half the speed of gear 31. A complete revolution of that ear would bring roller 22 to the bottom, viewed as in Fig. 7, and roller 23 at the top. In a less or greater rotation, gear 31 would cause one of the rollers 22 or 23 to be in the return path of the plow 18. Fig. 7 shows roller 22 in full lines, as in that path, the dotted lines indicating the original or normal or locked position of the cross-piece and its rollers. In the position shownin Fig. 7, plow 18 will engage with roller 22 and move it back to its original position. The effect of this is to rotate shaft 33, spider 32, and through pinion-37 to rotate forward gear 41 and the recording mechanism connected with it, and bring them into exactsyn chronism with the clock movement." If cross-piece 24 were so placed that plow 18 would contact with roller 23, it would rotate shaft 33, spider 32, in the other direction, moving gear 49 backward; in either case it would bring gear 49 and its connecting and recording mechanism into the exact original position-and into synchronism with the clock movement. For example, let us assume that after the recording mechanism has been locked and the spider unlocked, a length of time elapses before the recording .mechanism and the clock movement'are again operatively connected sufiicient to move cross-piece 24 from its normal or dotted line position of Fig. 7 to the full line position. To do this, gear 31 would, of course, move through twice the angular distance that cross-piece 24 has moved. Now when plow 18 moves to the left and returns cross-piece 24 and its rollers to their normal or dotted position, gear 41 is moved forward by this movement an angular distance just twice that represented between the full and the dotted line position of cross-piece 24 in Fig. 7. But this distance is exactly what gear 31 moved during operative disconnection of gear 41 and the recording mechanism from gear 31 and the clock movement. In other words, the return of cross-piece 24 moves gear 41 and its connecting time recording wheels forward just as far as the clock movement had gone forward during the disconnection, and this of course brings the time recording mechanism again into synchronism with the clock movement. If pinion 31 should have completed just half an entire rotation, wedge-shaped piece 35 would be opposite the point of plow 18. In that case, the plow 18 will force it either to the one side or the other. If cross-piece 24 has rotated so as to bring roller 22 beyond the point of plow 18 (below it as viewed in Fig.7), the plow will move roller 22 back to the position 00- cupied by roller 23 shown in dotted lines in Fig. 7. This will move gear 41 and its connecting time recording wheels backward a distance equal to 180 less the distance that gear 31 has moved forward during the disconnection of the parts, or in other words, the complement of that distance. This will again bring the time recording wheels into exact synchronism with the clock movement. It is, accordingly, immaterial Whether rollers 22 and 23 are one side or the other of the plow, or whether crosspiece 24 and its rollers are rotated forward or backward.- In either case, they cause gear 41 and its connecting time recordin wheels to be moved into synchronism with t e clock movement. a r

In the drawings,- I haveshown my improved synchronizing device as applied-only to the minute side of the clock=;movement and recording mechanism. This would-permit the recording-mechanism to be locked upfor the space of an hour; 7 If it be desired to have the device capable of being longer locked, this can be done by providing another and separatesynchronizer connectedv with the hour side, This would be simply a duplicate of the synchronizer shown adapted and arranged for the mechanism of the hour side-10f the clock movement and. recording mechanism. With such an addition,- the recording. mechanism could lie-looked for any length oftime desired.

- Itwill be understood .that in the-operation of the machine shown in the drawings,

when the handle 11 is operated-tit? will first. withdraw ploW- 18,from outthe path of.

cross-piece 24,- unlockingthe s ider-.32 of the differential, and then locking-Wheel 27 gear 41 and the recording mechanism. The clock movement continues to; move, idly driving the parts of the differential, without transmitting motion to the time recording wheels but rotating the cross-piece 24. The printing or calculating or other operation of the recording mechanism is now performed. Upon the return of the operating handle 11 to its original position, crosspiece 24-is moved forward or backward to its original position or. alinement, and in this movement it moves gear 41 and its con-, necting time recording wheels either backward or. forward until'they. are again in synchronism with the clock movement, whereupon the'spider 32 of the difierential is again locked in position. During the normal running of the parts, while the clock movement and the time recording mechanism are operatively connected, the differential gearing is normally inoperative so far as its differential features are concerned. It merely idly transmits motion from the clock movement, with which it is connected on one side, to the time recording mechanism, with which it is connected on the other. But when the time recording mechanism is operatively disconnected from the clock movement, the differential becomes operative so far as its differential features are concerned. These permit the clock movement to proceed without any hindrance, without affecting, the time recording mechanism and without the latter being actually disconnected so far as gears or mechanical connections are concerned and they actuate the synchronizing device.

It will, of course, be understood that many other changes and modifications, than those already indicated, from the devices specifically shown and described herein may be made without departing from my invention.

vl/Vhat I claim as new, and desire to secure by Letters Patent, is

l. The combination of driving mechapredetermined unison with the driving mechanism, irrespective of the length of time of such disconnection.

2. The combination of a'clock movement,

indicating mechanism driven by the clock movement in synchronism with it, means for operatively" disconnecting and reconnecting the-clock movement and the indicating. mechanism, and means for bringing theindicating mechanism again into synchronism with the clock movement, irrespective of the length of time of such disconnection.

3. The combination of a clock movement, time recording mechanism driven synchronously by the clock movement, means for operatively disconnecting the clock movement and time recording mechanism, and means for operatively reconnecting them and bringing the time recording mechanism again into synchronism with the clock movement, irrespective of the length of time of such disconnection.

4:. The combination of a clock movement, a time recording type wheel driven by the clock movement in synchronism therewith, means for operatively disconnecting the clock movement and the type wheel and for locking the latter, and means for unlocking the type wheel and operatively reconnecting it with the clock movement and for moving it again into synchronism with the clock movement, irrespective of the length of time of such disconnection.

5. The combination of a motor, mechanism driven thereby in unison therewith, a

differential gearing in the connections between the motor and the driven mechanism adapted normally to have its differential acting features inoperative and to merely connect on one side with the motor and on the other side with the driven mechanism so as merely to transmit motion from one to the other, means for locking and unlocking the driven mechanism, means for rendering the differential gear operative in its differential features so as to permit the continued motion of the motor without imparting the same to the driven mechanism and to actuate the ynchrcnizer, a synchronizer normally locked and adapted to be freed when the differential gear becomes operative, and means for returning the synchronizer to its original or an equivalent position when the driven mechanism is again unlocked and thereby bringing the driven mechanism again into unison with the motor.

6. The combination of a clock movement, time recording mechanism driven synchronously by the clock movement, a differential gearing in the connections between the clock movement and the time recording mechanism adapted normally to have its differ ential acting features inoperative and to merely connect on one side with the clock movement and on the other with the time recording mechanism to transmit motion from the clock movement to the latter, means for locking and unlocking the time recording mechanism, means for rendering the differential gear operative in its differential features, when the time recording mechanism is locked, so as to permit the continued motion of the clock movement without imparting such motion to the time recording mechanism and to actuate the synchronizer, a synchronize'r normally locked but adapted to be freed when the differential gear becomes operative and to be moved thereby, means for returning the synchronizer to its original or an equivalent position when the time recording mechanism is again unlocked and the differential gearing made inoperative, and connections between the synchronizer and the time recording mechanism operative during the return of the synchronizer and adapted to transmit motion from the synchronizer to bring the time recording mechanism again into synchronism with the clock movement.

7. The combination of a clock movement, time recording mechanism driven synchronously thereby, a differential gearing in the connections between the clock movement and the time recording mechanism adapted normally to transmit motion from the clock movement to the recording mechanism but adapted to permit the continued motion of the clock movement without affecting the recording mechanism when desired and adapted to move the time recording mechanism into synchronism with the clock movement when those parts are again operatively connected.

8. The combination of driving mechanism, mechanism driven thereby in a predetermined unison therewith, and means for separating, reconnecting and synchronizing the driven and driving mechanisms containing a device adapted to be connected with and driven by the driving mechanism in the same predetermined unison therewith during the said separation and during such time to be disconnected from the driven mechanism and adapted upon the reconnection of the driven and driving mechanisms to be connected with the driven mechanism and to move the latter into the same predetermined unison with the driving mechanism, irrespective of the length of time of such disconnection.

9. The combination of a clock movement, time recording mechanism, means for separating, reconnecting and synchronizing the time recording mechanism and the clock movement, such means containing a rotary device adapted during such separation to be disconnected from the recording mechanism and to be connected with the clock movement and to be driven synchronously therewith and also containing a part adapted to engage with the rotary device during the said reconnection to move it and the time recording mechanism a distance the equivalent of the displacement or movement of the rotary device during the separation to bring the time recording mechanism again into synchronism with the clock movement.

10. The combination of a clock movement, time recording mechanism driven synchronously thereby, and means for separating, reconnecting and synchronizing the time recording mechanism and the clock movement, said means containing a rotary cross-piece normally locked but adapted during the separation of the clock movement and the time recording mechanism to be unlocked and to be driven by the clock movement synchronously therewith and adapted during the reconnection of said parts to be connected with and to drive the time recording mechanism, said cross-piece being provided with a roller and a wedge-shaped piece at each end, and said means also containing a centralizing plow adapted on the re-connection of the clock movement and time recording mecha nism to engage with a roller of the cross piece and adapted to move the latter a distance the equivalent of its rotary displacement during said separation or the complement thereof to bring the time recording mechanism into synchronism with the clock movement.

11. The combination of a clock movement, time recording mechanism driven synchronously thereby, and means for separating, reconnecting and synchronizing the time recording mechanism and the clock movement, said means containing a differential having one of its inter-meshing pinions meshing with a gear connected to and driven by the clock movement and having its other pinion meshing with a gear connected with the time recording mechanism, and having its rotary member carrying the pinions normally locked so that the differential merely transmits motion from the clock movement to the time recording mechanism during such time, a cross-piece, provided at each end with a roller and wedge-shaped end, connected with the shaft of the supporting member of the differential gearing and rotary therewith, a wedge-shaped locking piece adapted to engage with the rollers of the cross-piece and to lock it from movement during the normal operation of the parts and adapted to free it, when the time recording mechanism is locked, and permit rotary movement of the cross-piece and supporting member of the differential and adapted on its return to its normal position to move the cross-piece one way or the other until returned to its original alinement, and means for locking and unlocking the recording mechanism, all so arranged that when the recording mechanism is unlocked the cross-piece and the supporting member of the diiferential will be locked and the difierential will merely transmit motion from the clock movement to the recording movement, and when the recording mechanism is locked the cross-piece and the supporting member of the diflerential will be freed and will be rotated by the clock movement in synchronism therewith, and, when the recording mechanism is again unlocked, the cross-piece will be returned to its original alinement and this movement will bring the time recording mechanism into synchronism again with the clock movement and the cross-piece and the supporting member of the differential will again be locked in their original positions.

12. The combination of a clock movement, a time recording wheel driven by the clock movement in synchronism therewith, means for operatively disconnecting the recording wheel and the clock movement, and means for operatively reconnecting the two and for moving the type wheel again into synchronism with the clock movement.

a time recording type wheel driven by the clock movement in synchronism therewith, means for operatively disconnecting and reconnecting the type wheel and the clock movement, and means for moving the type wheel into synchronism with the clock movement when the type wheel and clock movement are reconnected.

14:. In a time stamp, an impression menr her, a motor part therefor, and yielding connection between said motor part and the impression member arranged to normally move and maintain the impression member in predetermined rotary relation to the motor part to permit unlimited rotary displacement of the impression member with respect to the motor part, and to automatically return the impression member to the predetermined relation to the motor part from any abnormal position to which the impression member may be forced.

15. In a time stamp, a clock movement, an impression member, and a connection between said impression member and the clock part, normally maintaining said parts in predetermined position and yieldable to permit unlimited rotation of the impression member with respect to the clock part and adapted to return said parts to their normal predetermined position.

16. The combination of a motor, mechanism driven thereby in a predetermined unison therewith, a differential gearing in the connections between the motor and the driven mechanism adapted normally to transmit motion from the motor to the driven mechanism, but adapted to permit the continued motion of the motor without affecting the driven mechanism when desired and adapted to move the driven mechanism into the same predetermined unison with the motor when those parts are again operatively connected.

17. The combination of a clock movement, time recording mechanism driven synchronously thereby, and means for separating the time recording mechanism and the clock movement, for re-connecting them and upon such re-connection for synchronizing the time recording mechanism with the clock movement irrespective of the length of time of such separation.

18. The combination of a clock movement, time recording mechanism driven synchronously thereby, and means for separating, re-connecting and synchronizing the time recording mechanism and the clock movement upon their re-connection, said means containing a device normally locked, but adapted during the separation of the clock movement and the time recording mechanism to be unlocked and to be driven by the clock movement synchronously therewith and adapted upon the reconnection of those 13. The combination of a clock movement,

parts to be connected with the time recording mechanism and to move it into synchronism with the clock movement.

19. The combination of a clock movement, an impression member adapted normally to be driven thereby in synchronism therewith, and a connection between said impression member and the clock movement normally maintaining said arts in synchronism and yieldable to permlt unlimited movement of the impression member with respect to the clock movement.

20. The combination of a clock movement, an impression member adapted to be normally driven thereby in synchronism therewith, and means for disconnecting and connecting the impression member and clock movement adapted, when the said parts are connected, to cause the impression member to be driven synchronously with the clock movement, and after disconnection to move the impression member into synchronism with the clock movement, irrespective of the length of time of disconnection.

21. The combination of a time-keeping device, time recording mechanism adapted to be connected therewith or to be disconnected therefrom and adapted, when thus connected, to be controlled in its time recording operation by such time-keeping device, and means for connecting them or for disconnecting them for any period of time, adapted on such connection to bring the time recording mechanism into synchronism with the time-keeping device irrespective of the lengthof time of the previous disconnection.

22. The combination of a time controlled device, time recording mechanism adapted,

When connected with said device, to be moved into synchronism with it, and means for connecting them or for disconnecting them adapted, when connecting them, to move the time recording mechanism into synchronism with the time controlled device irrespective of the length of time of the pre vious disconnection.

23. In a time stamp, an impression member, a motor part therefor, and connection between said motor part and the impression member arranged to normally move and maintain the impression member in predetermined rotary relation to the motor part to permit unlimited rotary displacement of the impression member with respect to the motor part, and to automatically return the impression member to the predetermined relation to the motor part from any abnormal position to which the impression member may be forced.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

JAMES W. BRYCE.

Witnesses:

EDWIN SEGER, JOHN O. TEMPLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

